1. It can be applied to all types of flash. After the flash is connected, it can be directly connected to any lamp holder, which is convenient for photographers to use the flash for multi-directional light supplement when shooting outside. 2. Tighten the screws where the flash is connected to prevent the unstable connection between the flash and the lamp holder. Safety factor increased. 3. The lamp holder is provided with a jack for inserting a reflective umbrella or a soft light umbrella, and the Angle of the flash can be adjusted 180 degrees.Specification: Package Weight One Package Weight 0.23kgs / 0.51lb One Package Size 18.5cm * 12cm * 3cm / 7.28inch * 4.72inch * 1.18inch Qty per Carton 200 Carton Weight 45.00kgs / 99.21lb Carton Size 55cm * 29cm * 32cm / 21.65inch * 11.42inch * 12.6inch Loading Container 20GP: 522 cartons * 200 pcs = 104400 pcs40HQ: 1212 cartons * 200 pcs = 242400 pcs